LM3671MFX-1.375 National Semiconductor, LM3671MFX-1.375 Datasheet - Page 2

• Manufacturer Part Number: LM3671MFX-1.375
• Description: 2MHz / 600mA Step-Down DC-DC Converter in SOT23-5
• Manufacturer: National Semiconductor

www.national.com
Typical Application Circuits
Connection Diagram and Package Mark Information
Note: The actual physical placement of the package marking will vary from part to part.
Pin Description
Pin #
1
2
3
4
5
Name
GND
SW
V
EN
FB
IN
FIGURE 2. Typical Application Circuit for ADJ version
Description
Power supply input. Connect to the input filter capacitor (Figure 1).
Ground pin.
Enable pin. The device is in shutdown mode when voltage to this pin is
enabled when
Feedback analog input. Connect directly to the output filter capacitor for fixed voltage
versions. For adjustable version external resistor dividers are required. The internal
resistor dividers are disabled for the adjustable version.
Switching node connection to the internal PFET switch and NFET synchronous
rectifier.
NS Package Number MF05A
(Continued)
FIGURE 3. Top View
SOT23-5 Package
>
1.0V. Do not leave this pin floating.
2
20108402
20108431
<
0.4V and